Static sketches and incremental drawing don't work properly

[codeanticode]

Things like:

void setup() {
  size(400, 400, P2D); 
  background(255, 0, 0);
  fill(255, 150);
}

void draw() {
  ellipse(mouseX, mouseY, 100, 100); 
}

or

void setup() {
  size(400, 400, P2D); 
  background(255, 0, 0);
  fill(255);
  ellipse(200, 200, 100, 100); 
}

void draw() {
  noLoop();
}

show incorrect or glitchy rendering... seems that the FBO layer is not properly initialized with the latest contents from the framebuffer. Tested with latest release (243) on a Moto E with Android 5.1.1

[codeanticode]

Partially fixed with fb8feaf. Incremental drawing is working, but static sketches still don't work, just show a black screen:

void setup() {
  size(400, 400, P2D); 
  background(255, 0, 0);
  fill(255);
  ellipse(200, 200, 100, 100); 
}

void draw() {
  noLoop();
}

[codeanticode]

Fixed with dd0c246